PYTHON-4805 Migrate test_connections_survive_primary_stepdown_spec.py to async #759

Job	Run time
Make SDist	30s
Build wheels for manylinux_x86_64	2m 17s
Build wheels for manylinux_aarch64	10m 2s
Build wheels for manylinux_ppc64le	9m 34s
Build wheels for manylinux_s390x	10m 7s
Build wheels for manylinux_i686	2m 23s
Build wheels for win_amd6	5m 5s
Build wheels for win32	4m 49s
Build wheels for macos	2m 59s
Download Wheels	7s
	47m 53s

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